pmol to pg Converter
To convert pmol to pg, multiply the value in picomoles by the molecular weight (g/mol).
How to Convert pmol to pg
Use this pmol to pg converter to change picomoles into picograms. Enter pmol and the molecular weight.
Both units use the pico- prefix, so the rule is simply pg = pmol × molecular weight.
For example, 3 pmol of cortisol (MW 362.466 g/mol) is 3 × 362.466 = 1,087.4 pg.
pg = pmol × MWMultiply the picomoles by the molecular weight (g/mol) to get picograms.Conversion Formula
The formula to convert pmol to pg is:
Where:
- pmol = amount in picomoles (10⁻¹² mol)
- pg = mass in picograms (10⁻¹² g)
- MW = molecular weight (molar mass) in g/mol
Conversion Table
Common pmol to pg conversions are shown below. The last column uses cortisol (MW 362.466 g/mol) as an example.
| pmol | pg (formula) | pg for cortisol |
|---|---|---|
| 0.01 | 0.01 × MW | 3.62466 |
| 0.1 | 0.1 × MW | 36.2466 |
| 0.33 | 0.33 × MW | 119.61378 |
| 0.5 | 0.5 × MW | 181.233 |
| 1 | 1 × MW | 362.466 |
| 2.5 | 2.5 × MW | 906.165 |
| 5 | 5 × MW | 1,812.33 |
| 10 | 10 × MW | 3,624.66 |
| 33 | 33 × MW | 11,961.378 |
| 50 | 50 × MW | 18,123.3 |
| 100 | 100 × MW | 36,246.6 |
| 250 | 250 × MW | 90,616.5 |
| 500 | 500 × MW | 181,233 |
| 1,000 | 1,000 × MW | 362,466 |
Worked Examples
Here are some common examples of pmol to pg conversion, using cortisol (MW 362.466 g/mol):
- 362.466 pg = 1 pmol
- 1,812.33 pg = 5 pmol
- 11,961.378 pg = 33 pmol
- 36,246.6 pg = 100 pmol
Unit Definitions
What is a picomole (pmol)?
A picomole (pmol) is a unit of amount of substance equal to 10⁻¹² mole.
The prefix pico- (p) means 10⁻¹², or one trillionth. So 1 pmol = 0.000000000001 mol.
What is a picogram (pg)?
A picogram (pg) is a unit of mass equal to 10⁻¹² gram.
The prefix pico- (p) means 10⁻¹², or one trillionth. So 1 pg = 0.000000000001 g.
Why Is Molecular Weight Needed?
Moles count particles. Grams measure mass. One particle of each substance has its own mass, so the link between them is the molecular weight (MW), also called molar mass.
MW tells you how many grams one mole of a substance weighs. For example, one mole of water weighs about 18.015 g, while one mole of glucose weighs about 180.16 g.
Therefore, to convert pmol to pg, you multiply by MW. Both units use the same prefix size, so no extra step is needed.
Uses and Importance of pmol and pg
pmol and pg are a matched pair used at the most sensitive end of lab analysis.
Hormone units
Some hormones are reported in pmol/L and others in pg/mL. The pmol-to-pg rule underlies these conversions.
Instrument limits
Detection limits may be given in pg or pmol. Converting compares them fairly.
Isotope standards
Labelled standards are often added at pmol levels and recorded as pg.
Frequently Asked Questions (FAQ)
Why is pmol to pg just × MW?
The pico- prefix appears in both units, so the powers of ten cancel.
How many pg are in 1 pmol of cortisol?
About 362.466 pg.
How do I go from pmol/L to pg/mL?
pmol/L × MW gives pg/L. Divide by 1,000 to get pg/mL.
Is pmol to pg the same as nmol to ng?
Yes. Matching prefixes always reduce to mass = amount × MW.
Can this be used for peptides?
Yes. Use the peptide's molecular weight.
Other Related Tools
Accuracy and Scope
The result depends on the molecular weight you enter.
This tool does not interpret hormone results.
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